—How did the fire?--By a car accident.A. come aboutB. come onC. come toD. come over

—How did the fire ?
--By a car accident.
A. come about
B. come on
C. come to
D. come over

(答案→)A. come aboutB. come onC. come toD. come over解析：考查词组：A. come about发生，B. come on加油，C. come to到达，涉及，D. come over过来，句意：--大火是怎么发生的？--由于一场车祸。选A。

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